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This removes Python 3.9 support across all packages in the repository. Changes include: - Updated pyproject.toml files to require Python 3.10+ - Removed Python 3.9 from CI/CD test matrices - Updated documentation to reflect Python 3.10+ requirement - Removed Python 3.9 classifiers from all packages - Removed importlib_metadata dependency (only needed for Python <3.10) - Updated mypy target version to 3.10 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
CodSpeed Performance ReportMerging #19273 will not alter performanceComparing Summary
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…t.mock Replace all instances of AsyncMock being imported from prefect.testing.utilities with imports from unittest.mock instead. This change standardizes the mock imports to use the standard library's unittest.mock module rather than re-exporting from prefect.testing.utilities. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Update Dockerfile, documentation, and README files that still referenced Python 3.9 as the minimum version. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
desertaxle
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Oct 25, 2025
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| [tool.uv.sources] | ||
| prefect = { path = "../../../" } | ||
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ray==2.50.0 switched to using uv to set up execution environments, which doesn't work well with this source configuration. This change will cause the tests to run against the latest release prefect version instead of a dev version.
desertaxle
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cicdw,
kevingrismore and
zzstoatzz
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zzstoatzz
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Oct 27, 2025
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zzstoatzz
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zzstoatzz
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lgtm!
i think there are a few places we can remove <3.10 handling:
- https://github.com/prefecthq/prefect/tree/remove-python-39-support/src/prefect/utilities/compat.py#L8-L23
- https://github.com/prefecthq/prefect/tree/remove-python-39-support/src/prefect/utilities/importtools.py#L43-L46
- https://github.com/prefecthq/prefect/tree/remove-python-39-support/src/prefect/server/database/dependencies.py#L236-L248
zzstoatzz
approved these changes
Oct 27, 2025
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Summary
This PR removes Python 3.9 support from all packages in the repository. Python 3.9 is EOL at the end of this month.
Changes
Package Configuration
requires-pythonfrom>=3.9to>=3.10in:pyproject.tomlclient/pyproject.tomlpyproject.tomlfiles (18 packages)importlib_metadatadependency (only needed for Python <3.10)CI/CD
python-tests.yamldocker-images.yamlwindows-tests.yamlprefect-aws-docker-images.yamlstatic-analysis.yamlpython-package.yamlintegration-package-release.yamlprefect-client.yamlintegration-package-tests.yamlDocumentation
docs/v3/get-started/install.mdx🤖 Generated with Claude Code